VIM themes

The vertical bar you see is a helping highlight that is offered by recent vim
versions (try :cursorcolumn to toggle it).

If you are curious what some other things are (like the indetation markers)
and how they work, take a look at my .vimrc.
Note that the encoding is broken with that file so the "set lcs" part is
probably not copy-pasteable, follow the instructions in the comments above
that line in order to find out how you can make your own unicode-lcs.